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Four lenses of focal length +15 cm , +20...

Four lenses of focal length `+15 cm , +20 cm, +150 cm` and `+250cm` are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eye-piece should be

A

250 cm

B

150 cm

C

20 cm

D

15 cm, 5 cm

Text Solution

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The correct Answer is:
D
`m=f_(O)//f_(E)`
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